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In March, 25 percent of a certain company's 80 customers were females, and in April, 40 percent of its 160 customers were males. What is the percent increase from March to April in the number of female customers of the company?

In March, 25 percent of a certain company's 80 customers were females, and in April, 40 percent of its 160 customers were males. What is the percent increase from March to April in the number of female customers of the company?

A. 38% B. 68.75% C. 79.17% D. 220% E. 380%

In March, the company had \(0.25*80=20\) female customers: \(0.25*80=20\);

In April, the company had \((1-0.4)*160=96\) female customers;

General formula for percent increase or decrease, (percent change): \(\text{percent}=\frac{\text{Change}}{\text{Original}}*100\), so \(\text{percent}=\frac{96-20}{20}*100=380%\)